CVE-2026-78680NLTK before 3.10.3 Arbitrary Code Execution via Graphviz dot Binary
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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NLTK versions before 3.10.3 fail to use validated absolute paths when invoking the Graphviz dot binary in dependencygraph.dot2img and AlignedSent._repr_svg_, allowing attackers to execute arbitrary code by placing a malicious dot binary in the search path or current working directory. Attackers can exploit bare-name binary resolution on Windows via the current working directory or on Unix-like systems via relative PATH entries to execute their binary instead of the legitimate Graphviz tool.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-426
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Awaiting Analysis
- Record last updated
- Aug 25, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
nltk nltk nltk:nltk (from the name) | before 3.10.3; 3.10.3 not affected | CNA record |
References
- https://github.com/nltk/nltk/security/advisories/GHSA-6hwm-xvph-95vmvendor-advisory
- https://www.vulncheck.com/advisories/nltk-before-arbitrary-code-execution-via-graphviz-dot-binarythird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.